Insulator



W. T. GDAH. msumoa. BEST AVAILABLE COP APPLECATLDN FELED APH. 9, i920.

` Reissued June 22, 1920, 14.888.

A R l L .f7 m KW @gu Y w atto/mug BEST AVAILABLE copi..

` UNITED STATES PATENT oFFCE.

'WALTER Ll. GDEJARD. 0F HAMILTON. GNTARO, CANA-DA. ASSIGNR T0 .THE LQCKE INSULTGS.; lfFG. Ol." VICTOR. NEW' YORK. A ORPORATIUN OF NEVI YGRK.

INSULATOR.

4 Original .'lfl'o. 1,311,067, lated July 1919. SeTsilNo. EGLESS. l Jun@ 7. i916.

med Api-11 o. i920.

hi" n full, climi'. :nul xzu'iV iloSm-iltion ol the simio, I'o'i'oi'iurw hviii;` hail to the :ucompuuying drawing-S, forming ai purl. ol' this spocii'ulioii, :mil lo izho iiiii'iruco uuu'uiizih: marked thm-aou.

lily invention whites to iusuhitoi'o. with reference lmiliii-uhiily izo Lho typo wherein 'the insulator is 'mouiilisfii upon u ilu'ous', Wooden, oi' olhii' ohm-:Ncy oi? suplioitiug piu, und it has i'oi' its purpose to improve Auollioi' olijoi't of thu iuviul'iou lio proi viilo :iu insululoi' iu whivh tho `hos-'imi soif lugoous ohzufmtei'istii-s they @You ilih'trihuiiou throu; ';,h.out the ilii'oi-vut portions of thel insulator ol ho ,Strains lo whivh il'. issuhlimited, :is (lisl'ii'igruishcil fi'i'oro Prior insulzxtois of this gvmi'zil type ii'i- 'whii'h tho stlziiu is loizxlizoil :it :i Single point` oi' iii iL single direction unil iosulifs in giozi'tei likelihood of the iuSulntor looming. o1'l cracking nl sui-h point, mul it is: to oi'oi'como 'this iliszulviiutzigo mul thorvhy equalize tho stifengh of tho' insuluoi' :it its ilii'eiont pol'- tioils that l liu/vo designed tho piroweut struc- Speciication of Reissued, Letters Pnt-cnt. l fiiggqgijl il EN? 22?. "HQKL Application for reissue Serial No. 372.6813.

turf. To thvw mul oiluiifefiiils tho im'oniion vousists iu yoijtuiu uujpi'oi'mumis mici comlmmliouy: ol pui'lis :ill as will hv lwi'oinuftor .moro 'fully dosoiihoii, Vlho novel 'lezitiues heilig poiii'tml out` iii the claims zit the and of tho ,fpm-i'ioziixioii. l

iu the ihiiiving's. l

Figure l is :i plum View, taken partially in section on the lino la-lf of Fig. 2, :md showing u pin lypeinsuhitor emboffiying the present improveiiieu, :mil

Fig.. 2 .i5 u sectional view on line 2a-2 oi Fig. l.

Himilni' reference numerals throughout iho several views; iiuliiui'l'o the Sumo parts.

Lily ini'mitiou'uinv ho cziliieil ou in a im- .i'iet-y oi' ilii'vimii' wai` s., :mil il will he imi-ier- Slomi that this pi'osoui: emboilinuen inioni'lml monili' as illusmjntive of ou@ method for i'ihtuiuing the ilesii'iil, purposss. and in. the

sliiuuiie shown. tho insiuliilor .inchicies ai' sufrir-ooi: iimihiliiig sewioiis, iieoigiui'od geli- Qz'zilly :is l, 2, mul 3, uml iiioimled upon ai. [iin --I-. the listini'. hoiioi'ei', constituting no @ssiurizil purl oi 'thu im'vnlioul ish. metal wip hg." romans oiwhioh the Cousluctoi is voiuucmi to :imi iiiouiii'm. upon Elio iiiSul'zitoi.

lli wili hij ohzaeiifer'l filmt tho insulator here iii disclosed couipi'isicfs ihre@ iusuhziiig Sew lions ozu'h of whii-h hollow, lha ilmiaimost swtiou' hiring arranged to fuceiie ith@ Suppoviug piu. Suid iuuoii'oorst Sooliori 1S iiif'luflos i hitol'ul Slioulelcun oi' oli'sii' oi' pi'oinvii-uil' port-ion if. :ii'iizix fil helwiwii ih@ and: oi' illu'- sovtiou. :oui mieiuliug ui'ouml the hofiy or' i'iiii'i'oi :lling lo suppoi't luzuljnwouu iusuhiiug Sec.-

outer ai ou iu tho immuni' whif'h, will now :ippoui BEST AVAILABLE cop`A such a manner as to distribute the strain `equally along its inner sur-face, and this is preferably accomplished by supporting the outer section at dillerent points, or upon a plurality of independent surfaces arranged in spaced relation to each other and at angles to, or crosswise of, the longitudinal axis of the insulator. In the structure illustrated, the section 2 embodies lower edge T at its in* ner portion, and said edge communicates .strain to and preferably engages andjrests upon -the shoulder 6, it being vunderstood that the insulating sections are caused to adhere to oneanother by a cementing mediuin preferably 'arranged between them in the space indicated by 8, It will be seen that by supporting the outer section 2 uponthe inner section 3, both at the innermost end of the latter and also upon the shoulder 6, any strain that is created-is distributed along' the length of the outer section from Aits inner end to the lower edge 7, or, in other words, the strain is distributed equally along the portion lying between 'the two supportingsurfaccs formed by the -inner end of th section 3 and by the shoulder or projecting portion 6. The surfaces referred to are shown in parallel relation to one another,

although not necessarily so, and may be otherwise arranged provided they are at angles to, or crosswise of, the longitudinal axis of the insulator unit. The sections`2 and 3 are so formed that thel outer surfaces thereof, adjacent to the shoulder 6, form a continuation of one another, presenting a smooth and unobstructed surface which can be readily cleaned and is quite accessible, as is also the recess 9 that is formed by the skirt l0. vThe outermost insulating section l is'attaclied to the intermediate section 2 in .the same manner that the latter is mounted upon the innermost section 3, and .it is unnecessary to. f escribe these parts in any i'urther detail.- it is to be observed, however, that the insulator heretofore described is provided with a plurality of skirted sections and that the angle formed between the skirt of one section and the vertical axis of the'- insulator is less than the corresponding' angle formed by the skirt portion oi' the section next above. ll`he base portion of each section is also of less radial. distance from the vertical axis of the insulator than the base portion ot the adjacent section immediately above the same. tion the side walls of the sections are maintained substantially uniiorrn andare coniparatively thin and the leakage distance over the insulator is much greater than in former insulators oi' this general type. 7While the insulator may embody two, three ofsmore insulating sections, my invention resides in the particular manner of supporting each section upon the adjacent one, irrespective oi whether the insulating unit By this construcembodies more than two sections, or otherwise. The sections l and` 2 are also constructed so as to torni a continuous surface by their adjacent meeting portions, on opposite sides of the shoulder 1l oi' the section 2, and it will be seen that by this arrangenient'the entirey insulating unit presents a continuous exterior of such curves as will permit ready access and proper cleaning, effectively vpreventing any such collection of dirt as will interfere with the proper opeiation of the insulator, and this I consider to be an extremely important advantage oi my improvement.

I claim as my invention 1 l. An insulator *comprising a ,plurality of integral hollow insulating sections closed at their upper ends and nested one within the other, atleast one ot' said sections involving a body portion adapted to extend within the hollow section next above, an outwardly and downwardlyprojecting skirt portion joining said body portion above the lower edge ot the latter, the outer faces of said skirt and of the portion ot said body below the junction of said skirt and body respectively forming obtuse angles with the outer faces of adjacent corresponding body and skirt portions formed on the coact-ingv v insulating sections.

2.'An insulator comprisinga plurality i otintegral hollow insulating sections closed at their upper ends and nested one within the other, at least one of said sections involving a body portion adapted to extend within the hollow section next above, a shoulder formed on said body portion intermediate the ends thereof and adapted to forni a seat for the said upper section, a skirt portion extending outwardly and., downwardly from said shoulder, the outer faces of said skirt and of the. portion of the bodybelow the said shoulder.respectively forming obtuse angles with the outer adjacent faces of lthe enacting insulating sections.

3. An insulator comprising a plurality of integral hollow insulating sections closed at their upper ends and. nested one within the other, each of said sections involving a body portion having an` outwardly and downwardly eXtendingskii-t portion formed thereon. the angle formed by the skirt portion oi' one section with .the vei'tical axis oi" the insulator being less than the corresponding angle formed by the skirt portion of the section next above, the body portion oi at least 'one ot' said sections being'provided with a shoulder which extends at an angle to the vertical ot' said section, the said shoulder and top ot the body portion ot' the said section being adapted to form bearing surfaces to receive strains trans- BEST AvAfLABLE COP ing below the juncture ofthe said skirt and body portion,'the outer faces of the said skirt and of the body portion below the juncture of the skirt and body respectively forming obtuse angles with the outer faces of the adjacent corresponding body and skirt portions formed on the coacting insulating sections, and means for uniting the said sections.

4. An insulator comprising a plurality of hollow insulating sections closed at their upper ends and nested one Withinthe other one of said sections being intermediate of others, the intermediate section involving" a' body portion and a skirt portion connected thereto between the ends thereof, the outer faces of the skirt portion and of the body portion which extends below the juncture of' the 'skirt and body portions forming aefcontinuations of the adjacent outer faces of the sections next above and below the said intermediate section, whereby the joints of the several sections present a continuous and unobstructed surface free from acute angular ehangesin direction.

5, An insulator comprising a plurality of insulating sections closed at their upper ends and each provided with a hollow body portionof less diameter than the section next above and extending into the hollow interior of said upper section, each ot' said sections having an outwardly and downwardly projecting skirt adjacent its base,

and a bearing surface on each of said sec-- tions, the side walls of said sections beingl relatively thin and spaced to receive cementing material, the said hearing surfaces on a plurality of said sections being atI different radial distances from the vertical axis of the insulator and each being spaced vertically from the juncture of the interior surface of the skirt with the body portion of the section on which said bearing' surface is formed.

'ALTE lt T. GUDDARD. 

